Good Morning Rochelle, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link from the U of M Extension Yard and Garden website: 

https://extension.umn.edu/yard-and-garden-insects/japanese-beetles

This information states: 

• Japanese beetle grubs are pests of turfgrass. They chew grass roots, causing the turf to brown and die. Grub-damaged turf pulls up easily from the soil, like a loose carpet.

Here is another link: https://extension.umn.edu/lawns-and-landscapes/lawn-care

This information has numerous links to all information about lawn care. 

Good Luck!